Molecular evidence and ecology on exotic species, Gracilaria Agarophyte, on the coast of Japan

记述了生长在日本南部九州至东京沿海的两种江豚属(Gracilaria)新成员。龙须菜(Gracilaroa Lemaneiformis)日文名为“Seiyo-ogonori”。该分类群在形态上与龙须菜相似，但具有较小的四分孢子囊和较大的中层细胞。植物单生、纤细、圆柱形，全长30-200厘米。对不同海岸的几份材料的DNA分析结果显示，龙须菜具有相同的带型。这些植物常年生长在沙质海底。日本无花果植物中琼脂含量较高。在神奈川佐加岛发现了龙须菜，日语名为“Yore-ogontri”。这种裤子在几个地方的池塘和水箱中养殖，但这种物种没有在日本的任何海岸扩张。植株短，5-30厘米，不规则，近二叉，分枝形成缠绕的团块：略带紫色。本种为两种以上的形态类型。一种是夏威夷类型的，较长的植物，另一种类型是南亚类型的较小的植物。DNA分析显示，两种类型材料之间出现了不同的条带。

Two kind species of Gracilaria that grow on the coast of southern Japan, from Kyushu to Tokyo, is described new members of Japanese Gracilaria. Gracilaroa lemaneiformis are called "Seiyo-ogonori as Japanese name. This taxon is similar to G. chorda in morphrogy but has smaller tetrasporangia and larger meduallary cells Plants is solitary, delicate, cylindrical throughout, 30-200 cm. The results of DNA analysis among several materials of different coasts were showed the bands of same pattern of G. lemaneiformis. These plants grow on sandy bottom through the year. The quality of agar contents is higher level in the agarophyte in Japan.Gracilaria coronopiforia were found on the Jogashima, Kanagawa and are called "Yore- ogontri as Japanese name. The pants were cultured in the ponds and tanks in several places, but this species did not expand on any coasts in Japan. Plants are short, 5-30 cm, irregular and subdichotomus, branching to form an entangled mass : purplish color. This species are more two kind morphological types. One is Hawaii type ; longer plants, and another type is south Asian type, smaller plants. DNA analysis of the materials between two kind type are showed different bands.